iPhoto '08 hang when exporting with FlickrExport 3.0b23

I have been having a problem recently with iPhoto hanging (becoming unresponsive) shortly after I click the 'Export' button in the FlickrExport window. An exporting dialog box appears, however the progress bar remains blank, and the 'Cancel' button is unresponsive (also have the constant spinning beach ball). The only way for me to regain control of iPhoto is to force quit and reopen. This does not always happen, but I would say a occurs 75% of the time when I go to export photos to my flickr account.

I have attempted a uninstall/reinstall of FlickrExport in hopes of correcting the problem without success.

It does not seem to be tied to any tagging, description, or group selections I make as it happens when I do not enter any additional information before clicking 'Export'.

System: iMac C2D, OSX 10.5.3, iPhoto '08

console.app for iPhoto:
May 13 17:59:38 MadRiver iPhoto[16123]: This beta expires on: May 29 2008
May 13 18:01:57 MadRiver iPhoto[16123]: This beta expires on: May 29 2008
May 13 18:09:47 MadRiver iPhoto[16123]: This beta expires on: May 29 2008
May 13 18:10:33 MadRiver iPhoto[16123]: Set pool moderation status: 0
May 13 18:10:49 MadRiver iPhoto[16123]: This beta expires on: May 29 2008

Sample of iPhoto (while export hang is occuring):
Sampling process 16123 for 3 seconds with 1 millisecond of run time between samples
Sampling completed, processing symbols...
Analysis of sampling iPhoto (pid 16123) every 1 millisecond
Call graph:
1252 Thread_2503
1252 0x28d5
1252 0x29ae
1252 NSApplicationMain
1252 -[NSApplication run]
1252 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:]
1252 _DPSNextEvent
1252 _NSHandleCarbonMenuEvent
1252 _HandleMenuSelection
1252 _HandleMenuSelection2
1252 MenuSelectCore(MenuData*, Point, double, unsigned long, OpaqueMenuRef**, unsigned short*)
1252 FinishMenuSelection(MenuData*, MenuData*, MenuResult*, MenuResult*, unsigned long, unsigned long, unsigned long, unsigned char)
1252 SendMenuItemSelectedEvent
1252 SendMenuCommandWithContextAndModifiers
1252 SendHICommandEvent(unsigned long, HICommand const*, unsigned long, unsigned long, unsigned char, OpaqueEventTargetRef*, OpaqueEventTargetRef*, OpaqueEventRef**)
1252 SendEventToEventTarget
1252 SendEventToEventTargetInternal(OpaqueEventRef*, OpaqueEventTargetRef*, HandlerCallRec*)
1252 DispatchEventToHandlers(EventTargetRec*, OpaqueEventRef*, HandlerCallRec*)
1252 AppKitMenuEventHandler
1252 -[NSCarbonMenuImpl performActionWithHighlightingForItemAtIndex:]
1252 -[NSMenu performActionForItemAtIndex:]
1252 -[NSApplication sendAction:to:from:]
1252 0xe9e0b
1252 -[NSApplication runModalForWindow:]
1252 -[NSApplication _realDoModalLoop:peek:]
1252 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:]
1252 _DPSNextEvent
1252 BlockUntilNextEventMatchingListInMode
1252 ReceiveNextEventCommon
1252 RunCurrentEventLoopInMode
1252 CFRunLoopRunInMode
1252 CFRunLoopRunSpecific
1252 __NSThreadPerformPerform
1252 0x112b53
1252 0x2fa491
1252 0x255c0
1252 0x29cfd
1252 0xa0edc
1252 0xa0fd8
1252 -[NSRunLoop(NSRunLoop) runMode:beforeDate:]
1252 CFRunLoopRunInMode
1252 CFRunLoopRunSpecific
1249 mach_msg
1249 mach_msg_trap
1249 mach_msg_trap
1 mach_port_extract_member
1 mach_msg
1 mach_msg_trap
1 mach_msg_trap
1 mach_port_insert_member
1 mach_msg
1 mach_msg_trap
1 mach_msg_trap
1 mk_timer_destroy
1 mk_timer_destroy
1252 Thread_2603
1252 thread_start
1252 _pthread_start
1252 __NSThread__main__
1252 -[NSThread main]
1252 -[IMRemoteObjectBroadcaster _workerThread]
1252 CFRunLoopRunInMode
1252 CFRunLoopRunSpecific
1252 mach_msg
1252 mach_msg_trap
1252 mach_msg_trap
1252 Thread_2703
1252 thread_start
1252 _pthread_start
1252 __NSThread__main__
1252 -[NSThread main]
1252 -[NSUIHeartBeat _heartBeatThread:]
1252 -[NSConditionLock lockWhenCondition:]
1252 -[NSConditionLock lockWhenCondition:beforeDate:]
1252 -[NSCondition waitUntilDate:]
1252 pthread_cond_timedwait_relative_np
1252 _pthread_cond_wait
1252 semaphore_timedwait_signal_trap
1252 semaphore_timedwait_signal_trap
1252 Thread_2803
1252 thread_start
1252 _pthread_start
1252 select$DARWIN_EXTSN
1252 select$DARWIN_EXTSN
1252 Thread_2903
1252 thread_start
1252 _pthread_start
1252 __NSThread__main__
1252 -[NSThread main]
1252 -[ILMediaBrowserPathWatcher watcherThread:]
1252 -[NSRunLoop(NSRunLoop) runUntilDate:]
1252 -[NSRunLoop(NSRunLoop) runMode:beforeDate:]
1252 CFRunLoopRunInMode
1252 CFRunLoopRunSpecific
1251 mach_msg
1251 mach_msg_trap
1251 mach_msg_trap
1 mach_port_extract_member
1 mach_msg
1 mach_msg_trap
1 mach_msg_trap
1252 Thread_2a03
1252 thread_start
1252 _pthread_start
1252 __NSThread__main__
1252 -[NSThread main]
1252 -[ILMediaBrowserPathWatcher(SpotlightSupport) spotlightWatcherThread:]
1252 -[NSRunLoop(NSRunLoop) runUntilDate:]
1251 -[NSRunLoop(NSRunLoop) runMode:beforeDate:]
1251 CFRunLoopRunInMode
1251 CFRunLoopRunSpecific
1249 mach_msg
1249 mach_msg_trap
1249 mach_msg_trap
1 CFRunLoopRunSpecific
1 mach_port_extract_member
1 mach_msg
1 mach_msg_trap
1 mach_msg_trap
1 CFDateGetAbsoluteTime
1 CFDateGetAbsoluteTime
1252 Thread_2b03
1252 thread_start
1252 _pthread_start
1252 fe_fragment_thread
1252 pthread_cond_wait$UNIX2003
1252 __semwait_signal
1252 __semwait_signal
1252 Thread_2c03
1252 thread_start
1252 _pthread_start
1252 glvmDoWork
1252 pthread_cond_wait$UNIX2003
1252 __semwait_signal
1252 __semwait_signal
1252 Thread_2d03
1252 thread_start
1252 _pthread_start
1252 ReadSchedulerThreadEntryPoint
1252 TSWaitOnSemaphoreCommon
1252 TSWaitOnConditionTimedRelative
1252 pthread_cond_timedwait_relative_np
1252 _pthread_cond_wait
1252 semaphore_timedwait_signal_trap
1252 semaphore_timedwait_signal_trap
1252 Thread_2e03
1252 thread_start
1252 _pthread_start
1252 jpegdecompress_MPLoop
1252 pthread_cond_wait
1252 _pthread_cond_wait
1252 semaphore_wait_signal_trap
1252 semaphore_wait_signal_trap
1252 Thread_2f03
1252 start_wqthread
1252 __workq_ops
1252 __workq_ops
1252 Thread_3103
1252 thread_start
1252 _pthread_start
1252 CMMConvTask(void*)
1252 pthreadSemaphoreWait(t_pthreadSemaphore*)
1252 pthread_cond_wait$UNIX2003
1252 __semwait_signal
1252 __semwait_signal
1252 Thread_3203
1252 thread_start
1252 _pthread_start
1252 fe_fragment_thread
1252 pthread_cond_wait$UNIX2003
1252 __semwait_signal
1252 __semwait_signal
1252 Thread_3303
1252 thread_start
1252 _pthread_start
1252 __NSThread__main__
1252 -[NSThread main]
1252 +[NSURLConnection(NSURLConnectionReallyInternal) _resourceLoadLoop:]
1252 CFRunLoopRunInMode
1252 CFRunLoopRunSpecific
1252 mach_msg
1252 mach_msg_trap
1252 mach_msg_trap
1252 Thread_3403
1252 thread_start
1252 _pthread_start
1252 CFURLCacheWorkerThread(void*)
1252 CFRunLoopRunInMode
1252 CFRunLoopRunSpecific
1252 mach_msg
1252 mach_msg_trap
1252 mach_msg_trap
1252 Thread_3503
1252 thread_start
1252 _pthread_start
1252 __NSThread__main__
1252 -[NSThread main]
1252 0xea73f
1252 -[FUiPhotoExporter performExport:]
1252 -[FUFlickrExport startExport:]
1252 -[FUUploadEngine beginUploading]
1252 -[FUUploadEngine uploadNextImage]
1252 -[FUiPhotoExporter uploadEngine:willUploadImageRecord:usingUploadRequest:]
1252 -[FUImageRecord synchroniseMetadataWithiPhoto]
1252 -[NSAppleScript executeAndReturnError:]
1252 -[NSAppleScript(NSPrivate) _executeWithMode:andReturnError:]
1252 OSAExecute
1252 CallComponentDispatch
1252 AGenericManager::HandleOSACall(ComponentParameters*)
1252 AppleScriptComponent
1252 CallComponentFunction
1252 CallComponentFunctionCommon
1252 ASExecute(unsigned long, unsigned long, long, unsigned long*)
1252 UASExecute(unsigned char)
1252 UASExecute1()
1252 BCSetData()
1252 UASSetData(unsigned char, unsigned char)
1252 UASRemoteSetData(TUASObjectAlias*, TUASApplication*, TUASValue*)
1252 UASRemoteSend(unsigned char, unsigned char, unsigned char, unsigned char, unsigned char, unsigned char*)
1252 TUASApplication::Send(TStackFrame_UASRemoteSend*, AEDesc*, AEDesc*, unsigned char, unsigned char, unsigned char)
1252 ComponentSend(AEDesc const*, AEDesc*, long, long)
1252 AEDefaultSendProc(AEDesc const*, AEDesc*, long, short, long, unsigned char (*)(EventRecord*, long*, OpaqueRgnHandle**), unsigned char (*)(EventRecord*, long, long, AEDesc const*), long)
1252 AESend
1252 aeSend
1252 AESendMessage
1252 aeDispatchAppleEvent(AEDesc const*, AEDesc*, unsigned long, unsigned char*)
1252 _NSAppleEventManagerGenericHandler
1252 -[NSAppleEventManager dispatchRawAppleEvent:withRawReply:handlerRefCon:]
1252 -[NSScriptingAppleEventHandler handleCommandEvent:withReplyEvent:]
1252 -[NSSetCommand performDefaultImplementation]
1252 -[NSObject(NSScriptingInternal) _scriptingSetValue:forKey:]
1252 -[NSObject(NSKeyValueCoding) setValue:forKey:]
1252 0xad0f9
1252 0x25baf0
1252 0x1e2ac
1252 0x5beb9
1252 -[NSObject(NSThreadPerformAdditions) performSelectorOnMainThread:withObject:waitUntilDone:]
1252 -[NSObject(NSThreadPerformAdditions) performSelector:onThread:withObject:waitUntilDone:modes:]
1252 -[NSCondition wait]
1252 pthread_cond_wait$UNIX2003
1252 __semwait_signal
1252 __semwait_signal

Total number in stack (recursive counted multiple, when >=5):
14 _pthread_start
14 thread_start
10 mach_msg
10 mach_msg_trap
7 CFRunLoopRunInMode
7 CFRunLoopRunSpecific
6 -[NSThread main]
6 __NSThread__main__
5 __semwait_signal
5 pthread_cond_wait$UNIX2003

Sort by top of stack, same collapsed (when >= 5):
mach_msg_trap 7509
__semwait_signal 6260
semaphore_timedwait_signal_trap 2504
__workq_ops 1252
select$DARWIN_EXTSN 1252
semaphore_wait_signal_trap 1252
Sample analysis of process 16123 written to file /dev/stdout